Record position in parse exception

[cql-java-moved-to-github.git] / src / main / java / org / z3950 / zing / cql / CQLParser.java

diff --git a/src/main/java/org/z3950/zing/cql/CQLParser.java b/src/main/java/org/z3950/zing/cql/CQLParser.java
index 795b2f1..62a51b6 100644 (file)
--- a/src/main/java/org/z3950/zing/cql/CQLParser.java
+++ b/src/main/java/org/z3950/zing/cql/CQLParser.java
@@ -21,6 +21,7 @@ import java.util.List;
  */
 public class CQLParser {
     private CQLLexer lexer;
+    private PositionAwareReader par; //active reader with position
     private int compat;        // When false, implement CQL 1.2
     public static final int V1POINT1 = 12368;
     public static final int V1POINT2 = 12369;
@@ -96,14 +97,16 @@ public class CQLParser {
      * tree representing the query.  */
     public CQLNode parse(Reader cql)
        throws CQLParseException, IOException {
-       lexer = new CQLLexer(cql, LEXDEBUG);
+        par = new PositionAwareReader(cql);
+       lexer = new CQLLexer(par, LEXDEBUG);
 
        lexer.nextToken();
        debug("about to parseQuery()");
        CQLNode root = parseTopLevelPrefixes("cql.serverChoice",
                new CQLRelation(compat == V1POINT2 ? "=" : "scr"));
        if (lexer.ttype != CQLLexer.TT_EOF)
-           throw new CQLParseException("junk after end: " + lexer.render());
+           throw new CQLParseException("junk after end: " + lexer.render(), 
+              par.getPosition());
 
        return root;
     }
@@ -130,7 +133,7 @@ public class CQLParser {
            }
 
            if (sortnode.keys.size() == 0) {
-               throw new CQLParseException("no sort keys");
+               throw new CQLParseException("no sort keys", par.getPosition());
            }
 
            node = sortnode;
@@ -162,7 +165,7 @@ public class CQLParser {
                                                 new CQLProxNode(term, term2, ms));
            } else {
                throw new CQLParseException("expected boolean, got " +
-                                           lexer.render());
+                                           lexer.render(), par.getPosition());
            }
        }
 
@@ -179,7 +182,8 @@ public class CQLParser {
            match('/');
            if (lexer.ttype != CQLLexer.TT_WORD)
                throw new CQLParseException("expected modifier, "
-                                           + "got " + lexer.render());
+                                           + "got " + lexer.render(), 
+                  par.getPosition());
            String type = lexer.sval.toLowerCase();
            match(lexer.ttype);
            if (!isSymbolicRelation()) {
@@ -294,7 +298,8 @@ public class CQLParser {
        if (lexer.ttype != token)
            throw new CQLParseException("expected " +
                                        lexer.render(token, true) +
-                                       ", " + "got " + lexer.render());
+                                       ", " + "got " + lexer.render(), 
+              par.getPosition());
        int tmp = lexer.nextToken();
        debug("match() got token=" + lexer.ttype + ", " +
              "nval=" + lexer.nval + ", sval='" + lexer.sval + "'" +
@@ -325,7 +330,7 @@ public class CQLParser {
        }
 
        throw new CQLParseException("expected " + expected + ", " +
-                                   "got " + lexer.render());
+                                   "got " + lexer.render(), par.getPosition());
     }